Improvement in window-screens



E. c. fiunanwoon.

WINDOW-SCREEN.

No. 19Z,ZOO', 'Patented Jun e 19, 1877.

'INVENTEJR NPETERS, PHOTO-LWHOGhAPHER WASHINGTON. I10.

Unrran STATES EaAsTUs c. UNDERWOOD, OF-BOSTON,MASSACHUSETTS.

I IMPROVEMENT IN WINDOW-SCREENS.

Specification forming part of Letters Patent No. 192,200, dated J unc19, 1877 application filed April 19, 1877.

To all whom it may concern:

Be it known that I, ERASTUS (J. UNDER- WOOD, of Boston, in thecounty ofSuffolk and State of Massachusetts, have invented an linprovement inWindow-Screens, of which the following is a specification This inventionrelates particularly to the following-described construction ofwindowscreens, whereby adjust-ability for varying width ot'window iseffected.-

It consists, as shown in Figure l, of two frames, A B, of which theframeA is constructed with two vertical bars, a, and an upper and lowercross-piece, b, which are recessed and provided with grooves 0 upontheir outer edges. The wire or cloth 0 is fastened to the outer side of'the frame. The frame B has two vertical slats, d, which are fastened tothe inner side of the upper and lower crosspieces e. These cross-piecesare recessed, as shown, on theside to which the slats d are fastened,and the projectionsfare of suitable width to move freely in the grooves0, while the short projection g on frame A, formed by sinking thegrooves 0, are constructed to play in the grooves hbetween theprojections fand the slats d. The wire or cloth 0 is fastened at itsupper and lower edges tothe outer sides of the cross-piece e, and theside edges are secured to the inner surfaces of the slats d.

Of course, the upper and lower edges of the two frames are respectivelybeveled to fit the under surface of the window-sash and the window-sill.

In operation, the screen is adjusted by the sliding of frame B on frameA, and it will readily be seen that the construction is cheap andstrong.

I am aware that it is common in the state of the art to make adjustablewindow-screens of two frames, one of which slides on the other, and I donot claim that feature, broadly, but merely the specific construction ofthe frame for that purpose, as set forth and claimed. I

I claim and desire to secure by Letters Patent- The window-screendescribed, the same consisting of two independent frames, A B, theformer being provided with recessed and grooved cross-pieces b and thevertical bar a, and the latter with the cross-piece e, recessed asshown, and the vertical slats d, joining the sides of cross-pieces e attheir ends, as shown, each having the wire or cloth netting (J fastenedthereto, and arranged to operate as described.

, EBASTUS C. UNDERWOOD.

Witnesses: I

F. F. RAYMOND, 2d, A. J. OETTINGER.

PATENT Orrron

